Cov Dots Daj Tsis Paub: Puas Yog Koj Lub Tshuab Luam Ntawv Spying rau Koj?: 5 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:31

Xav txog tias txhua lub sijhawm koj luam daim ntawv, nws suav nrog tus lej zais uas tuaj yeem siv los txheeb xyuas lub tshuab luam ntawv - thiab, muaj peev xwm, tus neeg siv nws. Suab zoo li ib yam dab tsi los ntawm cov yeeb yaj kiab neeg soj xyuas, txoj cai? Hmoov tsis zoo, qhov xwm txheej tsis yog zaj dab neeg. Feem ntau cov tshuab luam ntawv xim laser thiab xim tshuab luam ntawv tau tsim los luam tawm qhov tsis pom kev taug qab cov lej hla txhua nplooj ntawv luam tawm ntawm lawv cov ntawv. Cov lej no qhia tawm lub tshuab twg tsim cov ntawv thiab, qee zaum, thaum daim ntawv luam tawm lossis luam tawm. los yog nrog lub scanner. Yog tias koj tsis muaj cov cuab yeej tsim nyog rau ib qib tshwj xeeb, mus rau tom ntej no. Yog xav paub ntxiv, lossis qhia koj qhov kev tshawb pom, thov mus ntsib peb ntawm https://www.eff.org/issues/printers. Want pab? Rub cov ntawv xeem ntawm

Kauj Ruam 1: Luam Nplooj Ntawv Nrog Cov Ntawv/duab

Luam tawm ib nplooj ntawv los ntawm lub tshuab luam ntawv xim laser. Nplooj ntawv yuav tsum siv xim thiab muaj qee cov ntawv lossis duab rau ntawm nws. Koj tuaj yeem pom cov npe ntawm cov tshuab luam ntawv uas peb paub luam tawm cov cim teev ntawm peb lub vev xaib. Raws li koj tab tom nrhiav rau tus dots, nco ntsoov tias lawv tau luam tawm hauv cov qauv rov ua dua tsis tu ncua thoob plaws nplooj ntawv (tsis yog nyob ntawm kaum ntawm nplooj ntawv), thiab yuav cuam tshuam nrog lwm cov ntaub ntawv luam tawm.

Kauj Ruam 2: Xiav Lub Teeb (w/ Unaided Eye) Txoj Kev

Koj yuav xav tau lub teeb xiav rau txoj kev no. EFF muaj lub teeb ci xiav LED muaj, lossis koj tuaj yeem tau txais lub teeb ci xiav LED lossis lwm yam muaj zog xiav lub teeb los ntawm lwm qhov chaw. Ib qho roj teeb uas siv hluav taws xob xiav LED yuav ua haujlwm. Tua txhua lub teeb, thiab tshem kom pom qhov kaj ib puag ncig ntau li ntau tau. Ci ib lub teeb ci xiav LED ntawm qhov seem ntawm nplooj ntawv luam tawm. Raws li tshuaj xyuas lub tshuab luam ntawv nplooj ntawv hauv qab lub teeb xiav txhim kho qhov sib txawv, cov xim daj yuav tsum tshwm xim dub. Yog tias koj muaj lub zeem muag zoo nyob ze, tom qab ntawd koj yuav tsum tuaj yeem pom lawv yooj yim. Tej zaum lawv yuav zoo li me me ntawm cov av lossis hmoov av. Yog tias koj tsis tuaj yeem pom cov dots zoo li no, kos kom ntseeg tau tias koj lub tshuab luam ntawv tau paub tsim lawv, thiab sim nug tus phooj ywg kom saib.

Kauj Ruam 3: Txoj Kev Scanner

Luam theej duab koj nplooj ntawv luam tawm ntawm lub tshuab luam ntawv xim xim ntawm 600 dpi; qhov no ua rau pom cov dots hauv cov duab scanned. Hloov kho lub tshuab luam ntawv tsis tsim nyog, vim nws twb muaj lub teeb xiav lawm. Cov dots tuaj yeem pom yooj yim los ntawm kev nthuav dav cov duab scanned, lossis los ntawm kev ua xim sib cais hauv software thiab tshuaj xyuas qhov xiav channel. Ntau yam ntawm cov duab ua software tuaj yeem ua cov xim sib cais. Ntawm no yog ob txoj hauv kev los tshuaj xyuas cov channel xiav nrog pub dawb/qhib qhov software: 1. Hauv GIMP, mus rau Layers, tom qab ntawd Channels, tom qab ntawd Paths. Hauv cov tshooj tab, xaiv qhov liab thiab ntsuab raws. 2. Nrog ImageMagick, khiav cov lus txib hauv qab no ntawm kab hais kom ua (sawv cev ntawm no los ntawm $ prompt):

$ hloov pauv -channel RG -fx 0 scan.tiff blue.pngQhov no tsim cov duab tshiab blue-p.webp

$ hloov --fx b scan.tiff grey.pngKoj tseem tuaj yeem ua qhov no sib cuam tshuam hauv Python yog tias koj tau nruab Python Imagining Library (PIL). Los ntawm Python sai, ru

>> ntshuam duab >>> Image.open (scan.tiff).split () [2].show ()kom pom cov duab greyscale tsim los ntawm cov xiav channel siv zog. PIL tseem tuaj yeem pab txhim kho qhov sib txawv. Piv txwv li, koj tuaj yeem sim cov hauv qab no txhawm rau txhawm rau sib txawv xim ntawm cov dots thiab nplooj ntawv

>> ntshuam duab >>> xiav = Image.open (scan.tiff).split () [2] >>> blue.point (lambda x: (256-x) ** 2).show ()

Kauj Ruam 4: Cov iav tsom iav los yog txoj kev tsom iav

Muab cov ntawv luam tawm tso rau hauv lub tsom iav lossis saib nws los ntawm lub iav tsom iav (qhov zoo tshaj nrog kev nthuav dav ntawm 10x lossis ntau dua). Txawm tias nyob hauv ib puag ncig lub teeb pom kev zoo, cov dots yooj yim pom. Peb tau sim ob lub tshuab computer USB (DigitalBlue thiab Dino-Lite), tab sis txhua lub tshuab tsom iav yuav tsum ua haujlwm.

Kauj ruam 5: Tam sim no Dab tsi?

Tam sim no koj tau pom cov dots, koj tuaj yeem ua dab tsi?

• Kawm ntxiv. Mus ntsib peb hauv online ntawm
• Qhia koj cov phooj ywg. Txawm hais tias muaj kev txaus siab tshaj tawm xov xwm - thiab kev lees paub tsawg los ntawm cov tuam txhab luam ntawv - muaj nyob ntawm cov xim daj taug qab thiab cov ntiv tes zoo ib yam yog tseem ua tiav rau txhua tus neeg. Qee tus neeg txawm hais tias tsis ntseeg tias cov txheej txheem taug qab no yeej muaj tiag. Koj tuaj yeem pab tshaj tawm lo lus tsuas yog los ntawm kev qhia koj cov phooj ywg tias cov dots nyob ntawd.
• Xa EFF koj cov ntawv luam EFF txuas ntxiv mus sau cov qauv los ntawm cov tshuab luam ntawv xim xim los pab peb tshawb fawb. Koj tuaj yeem rub tawm cov ntawv PDF los ntawm peb lub vev xaib, luam tawm cov ntawv txheeb ntawm koj lub tshuab luam ntawv xim xim, thiab xa lawv tuaj rau peb hauv kev xa ntawv.
• Tiv tauj cov neeg tsim khoom los ntawm Kev Pom Daj qhov chaw. Nws npau taws heev uas cov tuam txhab tsim khoom lag luam zais cia txhawm rau cuam tshuam peb tus kheej. Dab tsi phem dua, qee lub tuam txhab luam ntawv tau xav tias cov neeg uas tawm tsam yuav tsum yog cov neeg dag. Qhov Pom Daj qhov project los ntawm MIT Media Lab tau pab tib neeg kom sib cuag nrog cov tuam txhab luam ntawv los nthuav qhia kev txhawj xeeb txog kev ceev ntiag tug thiab thov cov tuam txhab kom kaw qhov kev taug qab thiab tso tseg kev saib xyuas cov yam ntxwv hauv kev siv thev naus laus zis. Koj tuaj yeem nrhiav cov ntaub ntawv tiv toj rau koj lub tshuab luam ntawv chaw tsim khoom - lossis cov tuam txhab tsim khoom siv uas koj tab tom txiav txim siab yuav.
• Koom nrog EFF los txhawb peb txoj haujlwm ntawm kev ceev ntiag tug, tsis qhia npe, thiab teeb meem hais lus dawb ntawm kev sib tshuam ntawm txoj cai lij choj thiab thev naus laus zis.

Ua tsaug tshwj xeeb rau California Consumer Protection Foundation rau nyiaj txiag rau txoj haujlwm.